Added GetMemoryInfo rpc command

_includes/devdoc/bitcoin-core/rpcs/rpcs/getmemoryinfo.md

@@ -0,0 +1,91 @@
+{% comment %}
+This file is licensed under the MIT License (MIT) available on
+http://opensource.org/licenses/MIT.
+{% endcomment %}
+{% assign filename="_includes/devdoc/bitcoin-core/rpcs/rpcs/getmemoryinfo.md" %}
+
+##### GetMemoryInfo
+{% include helpers/subhead-links.md %}
+
+{% assign summary_getMemoryInfo="returns information about memory usage." %}
+
+{% autocrossref %}
+
+*Added in Bitcoin Core 0.14.0*
+
+The `getmemoryinfo` RPC {{summary_getMemoryInfo}}
+
+*Parameters: none*
+
+*Result---information about memory usage*
+
+{% itemplate ntpd1 %}
+- n: "`result`"
+  t: "object"
+  p: "Required<br>(exactly 1)"
+  d: "An object containing information about memory usage"
+
+- n: "→<br>`locked`"
+  t: "string : object"
+  p: "Required<br>(exactly 1)"
+  d: "An object containing information about locked memory manager" 
+  
+- n: "→→<br>`used`"
+  t: "number (int)"
+  p: "Required<br>(exactly 1)"
+  d: "Number of bytes used"
+
+- n: "→→<br>`free`"
+  t: "number (int)"
+  p: "Required<br>(exactly 1)"
+  d: "Number of bytes available in current arenas"
+
+- n: "→→<br>`total`"
+  t: "number (int)"
+  p: "Required<br>(exactly 1)"
+  d: "Total number of bytes managed"
+
+- n: "→→<br>`locked`"
+  t: "number (int)"
+  p: "Required<br>(exactly 1)"
+  d: "Amount of bytes that succeeded locking"
+
+- n: "→→<br>`chunks_used`"
+  t: "number (int)"
+  p: "Required<br>(exactly 1)"
+  d: "Number allocated chunks"
+
+- n: "→→<br>`chunks_free`"
+  t: "number (int)"
+  p: "Required<br>(exactly 1)"
+  d: "Number unused chunks"
+  
+{% enditemplate %}
+
+*Example from Bitcoin Core 0.14.1*
+
+{% highlight bash %}
+bitcoin-cli getmemoryinfo
+{% endhighlight %}
+
+Result:
+
+{% highlight json %}
+{
+  "locked": {
+    "used": 0,
+    "free": 65536,
+    "total": 65536,
+    "locked": 65536,
+    "chunks_used": 0,
+    "chunks_free": 1
+  }
+}
+
+{% endhighlight %}
+
+*See also*
+
+* [GetMemPoolInfo][rpc getmempoolinfo]: {{summary_getMemPoolInfo}}
+
+{% endautocrossref %}